mk batteries 12 volt my batts. are 6 1/2 by 7 long by 3 wide it is mk andcomesfrom a small med scooter, sealed lead acid cycle use 14.5v at 77 deg. , 13.6-13.8 volt at77 deg. made taiwan. SLA BATT. imprinted in the top is 020307h9 in the grey plastic, I wanted to go to poss. 5by7 gel deep cycles but dont no any specs on this one to compare